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15 Cards in this Set
- Front
- Back
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An element is composed of |
One type of atom |
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Protons and neutrons are found in |
The Nucleus |
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Protons are |
particles with a +1 charge |
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Neutrons have a |
neutral charge |
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Electrons have a |
charge of -1 |
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Protons and neutrons are made of |
quarks |
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An electron cloud is |
the area around the nucleus of an atom |
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The number of protons is equal to |
the atomic number |
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The mass number |
is the sum of protons and neutrons |
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Atoms of the same element that have a different number of neutrons |
are isotopes |
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The average atomic mass is the |
average mass of the mixture of an element's isotopes |
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The periodic table is arranged by |
increasing atomic number |
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Element groups are numbered |
1-18 |
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An electron dot diagram uses |
the symbol of an element to represent the electrons in the outer energy level. |
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Horizontal rows of elements are |
periods |
